It's a Bender Bend-A-Brim Shape it wild to suit your style
USA Western Cowboy Hat HA43 Gus. A Crushable Leisure Hat Made from water repellent 100% Wool. Wire underwelt with 6 inch (15 cms) crown (rear) 4 inch (10cms) crown (front) and 3 1/2 inch ( 9cms) brim. The Hat Band has Small Concho's
Approx Sizes :
Small 54-55
Medium 56-57
Large 58-59
Xlarge 60-61